Datasheet

6 Maxim Integrated
SFP Controller for Dual Rx Interface
DS1877
DAC1, DAC2 ELECTRICAL CHARACTERISTICS
(V
CC
= +2.85V to +3.9V, T
A
= -40NC to +95NC, unless otherwise noted.)
ANALOG VOLTAGE MONITORING CHARACTERISTICS
(V
CC
= +2.85V to +3.9V, T
A
= -40NC to +95NC, unless otherwise noted.)
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.85V to +3.9V, T
A
= -40NC to +95NC, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Main Oscillator Frequency f
OSC
5 MHz
Delta-Sigma Input-Clock
Frequency
f
DS
f
OSC
/2 MHz
Reference Voltage Input (REFIN) V
REFIN
Minimum 0.1FF to GND
2 V
CC
V
Output Range 0 V
REFIN
V
Output Resolution
See the Delta-Sigma Outputs section for
details
10 Bits
Output Impedance R
DS
35 100
I
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ADC Resolution 13 Bits
Input/Supply Accuracy
(RSSI1_, RSSI2_, V
CC
)
ACC At factory setting 0.25 0.5 %FS
Update Rate for Temperature,
RSSI1_, RSSI2_, V
CC
t
RR
45 75 ms
Input/Supply Offset
(RSSI1_, RSSI2_, V
CC
)
V
OS
(Note 3) 0 5 LSB
Factory Setting (Note 4)
RSSI1/RSSI2 coarse 2.5
V
V
CC
6.5536
RSSI1/RSSI2 fine 312.5
FV
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Fault Reset Time (to FAULT = 0) t
INITR
From h V
CC
> VCC LO alarm (Note 5) 161 ms
LOSOUT Assert Time t
LOSS_ON
LOS_ LO (Note 6) 25.6 Fs
LOSOUT Deassert Time t
LOSS_OFF
LOS_ HI (Note 7) 25.6 Fs